Electronic desulfator

Anyone who has ever wondered "why the battery fails"", knows that most of the batteries fail because of the sulphation of the plates. This phenomenon is affected by all lead-acid batteries.

I was surprised by the simplicity of the work of restoring the battery with an electronic desulfator. In fact, all the manipulations were to connect the device to the battery and the restoration of sulfated plates would begin. Moreover, the battery did not even need to be removed from the car, unscrew the plugs of the cans to drain off the excess gas and perform some other actions. Even a charger connection is required. Yes, and special control is almost unnecessary - threw up the terminals and go do your thing, and the device will do it all. Thanks to the device you will be talking about, you can not only restore your battery, but also prevent the batteries that are still in the ranks.Thus, you extend their service for years.

Desulphator Operation Principle

Desulphator is powered by a battery, which it restores. For the same power circuit, it generates reverse short high-power pulses of high frequency. It has long been known that such pulses introduce lead sulfate molecules into resonance, and the result is a reverse process - desulfation and the battery restores its capacity and resistance. Of course, this recovery method has some drawbacks: not all batteries can be restored, but about 85 percent. And this, I will tell you, is a very good chance to try this method. Another disadvantage is a very long process of recovery, which can last from days to a month.

Desulfator circuit

On the chip 555 a master oscillator is assembled, which generates short pulses with a frequency of 1-3 kHz. Elements C1 and R3 filter the voltage, ensuring the normal operation of the generator. The output of the IC is loaded on a transistor that commutes the inductance. In the coil L1 just a powerful short pulse occurs after the transistor is closed.This pulse goes back to the battery through diode D1 and capacitor C4. Details: C1, C4 - the capacitance is indicated in microfarads. C1 should not be taken at 30 μF, but at 300 μF. It is better to make C4 composite by connecting in parallel 4 capacitors of 22 μF each, since it carries a very large load. The inductances L1 and L2 are wound on ferrite rings. It all depends on the permeability of the magnetic core and the diameter of the ring. L1 I have about 45 temples of 0.8 mm wire, and coil L2 70 turns of such wire. In general, I recommend using a tester with inductance measurement, when winding coils. Rings can be taken from unnecessary computer power supplies. D1 - any powerful 15-25 A.

Build a desulfator

I collected the circuit on the breadboard, from the bottom I soldered the jumpers with pieces of wire. The transistor was installed on a small heat sink. Then it was installed in a self-made case. Of course, the dimensions are too high and the device can be made much smaller.

Testing desulfator operation

It is advisable to connect the desulfator to the battery through a fuse, amps so two.Although the strength of the pulses there is much more, but their duration is not enough to disable the fuse. After connecting the device, you should hear a faint squeak indicating the normal operation of the device.

Well, the final test can only be done with an oscilloscope. To do this, first connect the probes to the input of the transistor (green diagram). After confirming the operation of the generator, you can connect the probes parallel to the output of the device (yellow diagram). And you will see periodic pikoobraznye pulses, indicating the normal operation of the desulfator. At peak these pulses reach 30 V, and at the terminals of the battery itself. A current fluctuates between 15-25 A.

Battery recovery process

It is advisable to fully charge the battery before restoring. If you are going to restore the battery standing on the ground, be sure to discard one power plug of the car, so as not to damage the electronics of your car. Next, connect the desulfator and wait. Waiting time is always individual.All you need to do is periodically monitor the battery — measuring the voltage to prevent a full discharge. It is necessary to measure the voltage when the desulfator is off, this is necessary. Maximum results can only be obtained after 4 weeks of continuous operation of the desulfator. Although the device is autonomous, I do not recommend leaving it unattended.